SU1501108A1 - Apparatus for determining the turn angle of object image - Google Patents

Abstract

The invention relates to measuring the characteristics of an object by analyzing its image and can be used in automated control operations, which makes it possible to increase the efficiency of determining the turning angles of objects of various shapes. The purpose of the invention is to expand the field of application of the device by determining the angle of rotation of the image of an object of circular shape with an eccentrically located mark. This is achieved in that a device containing a video sensor 1, a binary quantizer 2, a 3 clock pulse generator, a synchronizer 4, a block of 5 delay elements, an AND 7 element, a first counter 8, an EXCLUSIVE OR 6 element, a second counter 11, two registers 9 and 12 and the comparator 10. The blocks introduced allow to select the sign of the appearance of the upper edge of the image of the object and the sign of the mark on the current value of the quantitative spectrum. The time interval between the moments of occurrence of the formed features carries information about the rotation angle of the image of an object of circular shape. 2 Il.

Description

The invention relates to automation and can be used to measure the characteristics of an object by analyzing its image.

The aim of the invention is to expand the field of application of the device by determining the angle of rotation of the image of an object of circular shape with an eccentrically located mark.

Figure 1 shows a schematic structural diagram of the proposed device; figure 2 is a round object with an eccentrically located mark and quantitative spectrum. at the corners of the turn and with (0,

The device contains (Fig.1) video signal sensor, binary quantizer 2, 3 clock pulse generator, synchronizer 4, block 5 of delay elements, element EXCLUSIVE OR 6, element AND 7, first counter 8, first register 9, comparator 10, second counter 11 and a second register 12, the output of which is the output of the device.

The device works as follows.

Video signal sensor 1 converts the image of the object under study into an electric video signal, which is normalized by amplitude by binary quantizer 2 and fed to the information input of a block of 5 delay elements representing, for example, two bits of shift. The shift signals from the outputs of the shift bits are fed to the inputs of the EXCLUSIVE OR 6, which selects elementary vertical sections of the contour, and information in the form of 1 is fed to the first input of the element AND 7, to the second input of the element And 7, clock pulses are sent 3 clock pulse generator. At the same time, the And 7 element blocks the passage of false information from the block of 5 delay elements through the EXCLUSIVE OR element 6, as well as during the change of information in the block 5 of delay elements due to the delays of the bits of the register. Information on the presence of elementary vertical components. the contour of the image from the output of the element And 7 is fed to the counting input of the first counter 8, to the input of which zeroing lower-order syno is fed

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chronized signals — ie, pulses from the first output of synchronizer 4. First counter 8 counts the number of elementary vertical contour components per line. After the end of the line, information about the presence and number of elementary vertical components of the contour in this line goes to the first register 9. Information is recorded on the front of the horizontal sync pulse from the first synchronizer 4. This information in the first register 9 remains until the end of the next line. Information from the output of the first register 9 is fed to the first input of the digital comparator 10, where it is compared with the binary code corresponding to the decimal number 2. If the number of elementary vertical components of the circuit in the line is two, the first output of the digital comparator 10 is formed at the input of zeroing the second, counter 11, this is a sign of the upper edge of the image of the object (Fig. 2). The second counter 11 begins counting consecutive lines in which the number of elementary vertical contour components is 2, starting from the beginning of the image sweep. When the tag enters the field of view of the electronic window of the block 5 of the delay elements, the first counter 8 will count four elementary vertical components of the contour in rows (Fig. 2). At the same time, at the second output of the digital comparator 10, a signal 1 is generated, which arrives at the control input of the second register 12, which corresponds to the indication of the mark. The leading edge of this pulse information from the second counter 11 is recorded in the second register 12. At the same time, the second counter 11 is zeroed out. The information recorded in the second register 12 corresponds to the number of lines of the image of a circular object with an eccentrically located mark, in each of which two elementary vertical components are defined contour, starting from the beginning of the sweep. The number of these lines is functionally related to the rotation angle of the image of a round object with an eccentrically located mark.

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Thus, the use of the proposed device makes it possible to determine the angle of rotation of the image of a circular object with an eccentrically located mark. In addition, the device can estimate the angle of rotation of an image of an object having straight contour portions, and more accurate measurement will be provided by increasing the measuring base. If, in the prototype, the dimension of the electronic window of the image decomposition elements, then in the proposed device the measurement base is determined by the dimension of the image frame and is 300-500 image decomposition elements O1I. Another important advantage of the device in comparison with the prototype is the absence of the need to center the image of the object relative to the television raster.

Claims (1)

Invention Formula A device for determining the angle of rotation of an image of an object, comprising: a video signal sensor, a binary quantizer, a clock generator, a synchronizer, a block of delay elements, an element AND, first, and a counter, the output of the video signal sensor being connected to the input of a binary quantizer whose output is connected to information input block delay elements, the first and j 0 five 0 five 086 the second outputs of the synchronizer are connected respectively to the first and second inputs of the video signal sensor and to the first and second inputs of the clock generator, the output of which is connected to the clock input of the block of delay elements and the second input of the And element, the output of the And element is connected to the counting input of the first counter, characterized in that, in order to expand the field of application of the device by determining the angle of rotation of the image of an object of circular shape with an eccentrically located mark, a second counter is inserted in it, a parator, two registers, an EXCLUSIVE OR element, and the outputs of the block of delay elements are connected to the corresponding inputs of the exclusive OR element, the output of which is connected to the first input of the AND element, the first output of the synchronizer is connected to the control input of the first register, and the output of the first counter is connected to the information input of the first register, the output of which is connected to the input of the comparator, the first output of the comparator is connected to the counting input of the second counter, the output of which is connected to. The formation input of the second register, the control input of which is connected to the second output of the comparator, the output of the second register is the output of the device. Number s / ieMe / ffnffS cfrefffnflQ / string f (ii4ecfi76 (  / leMCf / moe c / tsf f po  / a. 1 s / prof (a FIG. 2